Nuclear Criticality Safety Engineer

RSI provides full-service environmental and nuclear solutions supporting clients through all phases of cleanup, nuclear operations and security, and facility lifecycle management. Built on a strong foundation of collaboration and a people-first culture, RSI delivers safe, technically sound solutions that help clients achieve mission success in some of the nation's most complex environments.

RSI is part of the ASRC Industrial Services family of companies unified by purpose to deliver safe, reliable solutions to our clients’ unique challenges. We are committed to providing technically superior service, adding value at every stage, and leaving things better than we found them.

We are seeking a qualified Nuclear Criticality Safety (NCS) Engineer to join our nuclear safety basis team. In this role, you will play a vital part in ensuring the safe handling, storage, transportation, and processing of fissile materials. You will be responsible for evaluating facility operations, performing complex computer modeling, and establishing engineering controls to ensure compliance with the double-contingency principle and prevent accidental nuclear chain reactions.

• Develop, review, and maintain Nuclear Criticality Safety Evaluations (NCSEs) and supporting technical analyses.
• Assist with reviewing safety document reviews and project activities including Safety Analysis and Criticality Safety activities in compliance with 10 CFR 830, and associated implementing documents.
• Development, revision, and review of Nuclear Criticality Safety (NCS) documentation such as Criticality Safety Evaluations (CSEs), Nuclear Criticality Safety Design Analysis and Calculations (DACs) and various other NCS technical basis documentation:
• Completion of required NCS annual Operational Reviews as needed.
• Daily nuclear facility support as needed, consisting of facility walkdowns, review of NCS requirements implementing documents, participation at facility Operational Safety Boards,
• Assist with interfacing with project engineers and project management coordination with NEPA, and support in the development of Safety in Design Expectations.
• Daily nuclear facility support as needed, consisting of facility walkdowns, review of NCS requirements implementing documents, participation at facility Operational Safety Boards,
• Assist with interfacing with project engineers and project management coordination with NEPA, and support in the development of Safety in Design Expectations.
• Assist with reviewing facility, site characteristics, design of the structure, systems, and components, engineered safety features, instrumentations and control systems, electrical power systems, auxiliary systems, radiation protection program and waste management, conduct of operations, accident analysis, derivation of technical specifications, initial test program and inspections, test, and operational readiness reviews.
• Perform criticality calculations and analyses using industry-standard computational tools (e.g., SCALE, MCNP, KENO, MONK, or equivalent).
• Establish and verify criticality safety limits and controls for facility operations involving fissile and fissionable materials.
• Conduct hazard assessments and support documented safety analyses (DSAs), technical safety requirements (TSRs), and accident analyses.
• Evaluate proposed operational changes for compliance with criticality safety requirements.
• Support facility readiness reviews, operational assessments, and regulatory inspections.
• Investigate abnormal events, identify root causes, and recommend corrective actions.
• Provide technical guidance and training to operations personnel regarding criticality safety principles and controls.
• Participate in procedure development, work planning, and operational readiness activities.
• Interface with DOE, National Nuclear Security Administration (NNSA), contractors, and regulatory stakeholders as required.

• Bachelor's degree in Nuclear Engineering, Mechanical Engineering, Chemical Engineering, Physics, or a related technical discipline.
• Must demonstrate 15 years of experience in criticality analysis including experience developing and issuing Nuclear Criticality Safety Evaluations for DOE Nuclear facilities or equivalent commercial nuclear facilities.
• Strong written and verbal communication skills with the ability to prepare technical documentation and present findings.
• Ability to work independently and collaboratively in a highly regulated…